com.tencent.kona.sun.security.x509.ExtendedKeyUsageExtension Maven / Gradle / Ivy
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* published by the Free Software Foundation. Oracle designates this
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*
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* accompanied this code).
*
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package com.tencent.kona.sun.security.x509;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Vector;
import com.tencent.kona.sun.security.util.DerOutputStream;
import com.tencent.kona.sun.security.util.DerValue;
import com.tencent.kona.sun.security.util.KnownOIDs;
import com.tencent.kona.sun.security.util.ObjectIdentifier;
/**
* This class defines the Extended Key Usage Extension, which
* indicates one or more purposes for which the certified public key
* may be used, in addition to or in place of the basic purposes
* indicated in the key usage extension field. This field is defined
* as follows:
*
* id-ce-extKeyUsage OBJECT IDENTIFIER ::= {id-ce 37}
*
* ExtKeyUsageSyntax ::= SEQUENCE SIZE (1..MAX) OF KeyPurposeId
*
* KeyPurposeId ::= OBJECT IDENTIFIER
*
* Key purposes may be defined by any organization with a need. Object
* identifiers used to identify key purposes shall be assigned in
* accordance with IANA or ITU-T Rec. X.660 | ISO/IEC/ITU 9834-1.
*
* This extension may, at the option of the certificate issuer, be
* either critical or non-critical.
*
* If the extension is flagged critical, then the certificate MUST be
* used only for one of the purposes indicated.
*
* If the extension is flagged non-critical, then it indicates the
* intended purpose or purposes of the key, and may be used in finding
* the correct key/certificate of an entity that has multiple
* keys/certificates. It is an advisory field and does not imply that
* usage of the key is restricted by the certification authority to
* the purpose indicated. Certificate using applications may
* nevertheless require that a particular purpose be indicated in
* order for the certificate to be acceptable to that application.
*
* If a certificate contains both a critical key usage field and a
* critical extended key usage field, then both fields MUST be
* processed independently and the certificate MUST only be used for a
* purpose consistent with both fields. If there is no purpose
* consistent with both fields, then the certificate MUST NOT be used
* for any purpose.
*
* @since 1.4
*/
public class ExtendedKeyUsageExtension extends Extension {
public static final String NAME = "ExtendedKeyUsage";
/**
* Vector of KeyUsages for this object.
*/
private Vector keyUsages;
// Encode this extension value.
private void encodeThis() {
if (keyUsages == null || keyUsages.isEmpty()) {
this.extensionValue = null;
return;
}
DerOutputStream os = new DerOutputStream();
DerOutputStream tmp = new DerOutputStream();
for (int i = 0; i < keyUsages.size(); i++) {
tmp.putOID(keyUsages.elementAt(i));
}
os.write(DerValue.tag_Sequence, tmp);
this.extensionValue = os.toByteArray();
}
/**
* Create a ExtendedKeyUsageExtension object from
* a Vector of Key Usages; the criticality is set to false.
*
* @param keyUsages the Vector of KeyUsages (ObjectIdentifiers)
*/
public ExtendedKeyUsageExtension(Vector keyUsages) {
this(Boolean.FALSE, keyUsages);
}
/**
* Create a ExtendedKeyUsageExtension object from
* a Vector of KeyUsages with specified criticality.
*
* @param critical true if the extension is to be treated as critical.
* @param keyUsages the Vector of KeyUsages (ObjectIdentifiers),
* cannot be null or empty.
*/
public ExtendedKeyUsageExtension(Boolean critical,
Vector keyUsages) {
if (keyUsages == null || keyUsages.isEmpty()) {
throw new IllegalArgumentException(
"key usages cannot be null or empty");
}
this.keyUsages = keyUsages;
this.extensionId = PKIXExtensions.ExtendedKeyUsage_Id;
this.critical = critical.booleanValue();
encodeThis();
}
/**
* Create the extension from its DER encoded value and criticality.
*
* @param critical true if the extension is to be treated as critical.
* @param value an array of DER encoded bytes of the actual value.
* @exception ClassCastException if value is not an array of bytes
* @exception IOException on error.
*/
public ExtendedKeyUsageExtension(Boolean critical, Object value)
throws IOException {
this.extensionId = PKIXExtensions.ExtendedKeyUsage_Id;
this.critical = critical.booleanValue();
this.extensionValue = (byte[]) value;
DerValue val = new DerValue(this.extensionValue);
if (val.tag != DerValue.tag_Sequence) {
throw new IOException("Invalid encoding for " +
"ExtendedKeyUsageExtension.");
}
keyUsages = new Vector<>();
while (val.data.available() != 0) {
DerValue seq = val.data.getDerValue();
ObjectIdentifier usage = seq.getOID();
keyUsages.addElement(usage);
}
}
/**
* Return the extension as user readable string.
*/
public String toString() {
if (keyUsages == null) return "";
String usage = " ";
boolean first = true;
for (ObjectIdentifier oid: keyUsages) {
if(!first) {
usage += "\n ";
}
String res = oid.toString();
KnownOIDs os = KnownOIDs.findMatch(res);
if (os != null) {
usage += os.stdName();
} else {
usage += res;
}
first = false;
}
return super.toString() + "ExtendedKeyUsages [\n"
+ usage + "\n]\n";
}
/**
* Write the extension to the DerOutputStream.
*
* @param out the DerOutputStream to write the extension to.
*/
@Override
public void encode(DerOutputStream out) {
if (extensionValue == null) {
extensionId = PKIXExtensions.ExtendedKeyUsage_Id;
critical = false;
encodeThis();
}
super.encode(out);
}
/**
* Get the keyUsages value.
*/
public Vector getUsages() {
return keyUsages;
}
/**
* Return the name of this extension.
*/
@Override
public String getName() {
return NAME;
}
public List getExtendedKeyUsage() {
List al = new ArrayList<>(keyUsages.size());
for (ObjectIdentifier oid : keyUsages) {
al.add(oid.toString());
}
return al;
}
}